The continuous call time and continuous standby time listed are average time lengths for usage from combined moving and fixed locations with normal signal reception. The actual times for which the phone can be used will vary widely depending on a variety of conditions, including calling time, number of calls, email composing time, number of sent and received emails, usage conditions of Internet and applications, and network conditions. (More frequent usage or poor signal reception shortens these times. Less frequent usage extends the times.)

This figure has been confirmed through the operation test following KDDI's standard. With some models, copyrighted data that can be stored in external storage is transferable to secured external memories. However, note that the availability varies depending on the manufacturers: some microSD™ cards, microSDHC™ cards and microSDXC™ cards even with the above-mentioned specifications may be unsupported.

The entire memory capacity cannot be used to save apps and data.

Be sure the caps are securely fastened and the battery cover on devices with a removable battery cover is firmly in place. Do not immerse the unit in ocean, pool, or hot water. Do not place the unit on the sand.

Measured with the common AC adapter 05

IPX5 rating: The unit will retain its functionality as a phone even if blasted with water projected at all angles through 6.3 mm nozzles at a flow rate of approximately 12.5 liters per minute for more than 3 minutes from a distance of approximately 3 meters. IPX8 rating: Water will not leak inside and the unit will retain its functionality as a phone even if it is gently immersed in a tank of still tap water at room temperature at a depth of 1.5 meters and placed on the bottom for approximately 30 minutes.

IP5X rating: When the unit is churned for 8 hours inside a dust resistance testing tube, the unit maintains its functionality and safety even when test dust (a diameter of 75 µm or less) enters the unit.

When connecting with other devices that support au VoLTE (within the au 4G LTE area),voice calls with high-quality sound are enabled. In other situations, a conventional level of sound quality is enabled for voice calls.

au VoLTE supports voice calls with high-quality sound.

3G communication (maximum downlink speed of 144Kbps/maximum uplink speed of 64Kbps) is also supported (settings are required to be changed)

150 Mbps is not available in some areas. For details, check the service areas.

Each of the above communication speeds is a best-effort service. Note that the maximum communication speed is not the actual communication speed, but the maximum value based on the technical standards. The actual speed may fall substantially short of the maximum for various reasons including customer's communication environment and traffic conditions.